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Hi, this is the first time I have used a forum. I would like to buy a complete bagging unit for my tractor - it is 2004 Craftsman with a 48" cut. I am not sure what model number to search for. does anyone know if an aftermarket or some other manufactured bagging unit will fit my tractor. Model number 917-275280 - is there a universal fit bagging unit that will work? thanks for your help.